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12/22/2021
You Asked... We Answered 12/22/21
You Asked:
We have a resident who wants to use a humidifier. Is there any guidance about humidifiers related to COVID-19?
We Answered:
Yes, CDC notes that both temperature and humidity can influence the transmission of infectious diseases, including COVID-19. Survival of viruses, including human coronaviruses, may be reduced when the relative humidity is in the 40–60% range. In addition, preventing excessive dryness in the air could help maintain the effectiveness of the human body’s immune system. If an individual is wanting to use a humidifier for comfort, CDC recommends using a humidifier with a built-in humidistat and control the relative humidity level near 40%. Higher humidity levels are not necessarily better and may lead to localized mold growth, mildew, and other long-lasting indoor air quality issues. Maintenance and cleaning of portable humidification systems is very important. Change the water in the humidifier daily and maintain and clean the humidifier in accordance with manufacturer recommendations. Additional information can be found in the FAQ #10 under ventilation on the CDC’s Ventilation in Buildings webpage. Facilities should also refer to the legionella considerations and cleaning recommendations provided by CDC when using humidifiers. We encourage members to continue to submit questions to COVID19@leadingageohio.org.